Removing more unnecessary unsafe blocks throughout

src/libcore/gc.rs

@@ -231,7 +231,6 @@ unsafe fn walk_gc_roots(mem: Memory, sentinel: **Word, visitor: Visitor) {
     // the stack.
     let mut reached_sentinel = ptr::is_null(sentinel);
     for stackwalk::walk_stack |frame| {
-        unsafe {
         let pc = last_ret;
         let Segment {segment: next_segment, boundary: boundary} =
             find_segment_for_frame(frame.fp, segment);
@@ -292,7 +291,6 @@ unsafe fn walk_gc_roots(mem: Memory, sentinel: **Word, visitor: Visitor) {
         reached_sentinel = delay_reached_sentinel;
     }
 }
-}
 
 pub fn gc() {
     unsafe {

src/libcore/pipes.rs

@@ -156,10 +156,8 @@ pub impl PacketHeader {
     unsafe fn unblock(&self) {
         let old_task = swap_task(&mut self.blocked_task, ptr::null());
         if !old_task.is_null() {
-            unsafe {
             rustrt::rust_task_deref(old_task)
         }
-        }
         match swap_state_acq(&mut self.state, Empty) {
           Empty | Blocked => (),
           Terminated => self.state = Terminated,

src/libcore/rt/sched/local_sched.rs

@@ -80,11 +80,9 @@ pub unsafe fn unsafe_borrow() -> &mut Scheduler {
 }
 
 pub unsafe fn unsafe_borrow_io() -> &mut IoFactoryObject {
-    unsafe {
     let sched = unsafe_borrow();
     return sched.event_loop.io().unwrap();
 }
-}
 
 fn tls_key() -> tls::Key {
     maybe_tls_key().get()

src/libcore/rt/uvll.rs

@@ -98,7 +98,7 @@ pub enum uv_req_type {
 
 pub unsafe fn malloc_handle(handle: uv_handle_type) -> *c_void {
     assert!(handle != UV_UNKNOWN_HANDLE && handle != UV_HANDLE_TYPE_MAX);
-    let size = unsafe { rust_uv_handle_size(handle as uint) };
+    let size = rust_uv_handle_size(handle as uint);
     let p = malloc(size);
     assert!(p.is_not_null());
     return p;
@@ -110,7 +110,7 @@ pub unsafe fn free_handle(v: *c_void) {
 
 pub unsafe fn malloc_req(req: uv_req_type) -> *c_void {
     assert!(req != UV_UNKNOWN_REQ && req != UV_REQ_TYPE_MAX);
-    let size = unsafe { rust_uv_req_size(req as uint) };
+    let size = rust_uv_req_size(req as uint);
     let p = malloc(size);
     assert!(p.is_not_null());
     return p;

src/libcore/unstable.rs

@@ -262,7 +262,6 @@ pub impl<T:Owned> Exclusive<T> {
     // the exclusive. Supporting that is a work in progress.
     #[inline(always)]
     unsafe fn with<U>(&self, f: &fn(x: &mut T) -> U) -> U {
-        unsafe {
         let rec = get_shared_mutable_state(&self.x);
         do (*rec).lock.lock {
             if (*rec).failed {
@@ -275,7 +274,6 @@ pub impl<T:Owned> Exclusive<T> {
             result
         }
     }
-    }
 
     #[inline(always)]
     unsafe fn with_imm<U>(&self, f: &fn(x: &T) -> U) -> U {

src/libcore/unstable/weak_task.rs

@@ -43,11 +43,11 @@ pub unsafe fn weaken_task(f: &fn(Port<ShutdownMsg>)) {
     let task = get_task_id();
     // Expect the weak task service to be alive
     assert!(service.try_send(RegisterWeakTask(task, shutdown_chan)));
-    unsafe { rust_dec_kernel_live_count(); }
+    rust_dec_kernel_live_count();
     do (|| {
         f(shutdown_port.take())
     }).finally || {
-        unsafe { rust_inc_kernel_live_count(); }
+        rust_inc_kernel_live_count();
         // Service my have already exited
         service.send(UnregisterWeakTask(task));
     }

src/librustc/middle/trans/base.rs

@@ -2628,13 +2628,11 @@ pub fn get_item_val(ccx: @CrateContext, id: ast::node_id) -> ValueRef {
             let class_ty = ty::lookup_item_type(tcx, parent_id).ty;
             // This code shouldn't be reached if the class is generic
             assert!(!ty::type_has_params(class_ty));
-            let lldty = unsafe {
-                T_fn(~[
+            let lldty = T_fn(~[
                     T_ptr(T_i8()),
                     T_ptr(type_of(ccx, class_ty))
                 ],
-                T_nil())
-            };
+                T_nil());
             let s = get_dtor_symbol(ccx, /*bad*/copy *pt, dt.node.id, None);
 
             /* Make the declaration for the dtor */

src/libstd/arc.rs

@@ -177,7 +177,6 @@ pub impl<T:Owned> MutexARC<T> {
      */
     #[inline(always)]
     unsafe fn access<U>(&self, blk: &fn(x: &mut T) -> U) -> U {
-        unsafe {
         let state = get_shared_mutable_state(&self.x);
         // Borrowck would complain about this if the function were
         // not already unsafe. See borrow_rwlock, far below.
@@ -187,7 +186,6 @@ pub impl<T:Owned> MutexARC<T> {
             blk(&mut (*state).data)
         }
     }
-    }
 
     /// As access(), but with a condvar, as sync::mutex.lock_cond().
     #[inline(always)]
@@ -195,7 +193,6 @@ pub impl<T:Owned> MutexARC<T> {
         &self,
         blk: &fn(x: &'x mut T, c: &'c Condvar) -> U) -> U
     {
-        unsafe {
         let state = get_shared_mutable_state(&self.x);
         do (&(*state).lock).lock_cond |cond| {
             check_poison(true, (*state).failed);
@@ -207,7 +204,6 @@ pub impl<T:Owned> MutexARC<T> {
         }
     }
 }
-}
 
 // Common code for {mutex.access,rwlock.write}{,_cond}.
 #[inline(always)]